I Remember thse magazines from the Doctors office when i was a kid.
I picked up a few and the Grandkids loved them.

I have 4 subscriptions from this company for my grandchildren. 2 of which I pay by check yearly, 2 of which I pay monthly. These more expensive subscriptions run about $15 a month each.
No matter what how much I pay them, The bill always shows a

previous balance, $.00 payments/credits Balance due (twice the monthly $)

This is paid on my Bill Pay account, so I set up the payments when I started the subscription.
Turns out that it is not a Monthly Subscription, Their billing cycle is closer to 25/28 days ... Ya it's one extra payment a year... not a big deal. When I called Customer Service, To check if indeed my last monthly payment was credited correctly, The Gal on the phone said that "it happens it everybody... My payment was getting in to late to be credited before the bill was printed."
I went into my bill pay and move the date up a week. Problem solved! ...
Not really. Waited a couple of months to let the billing cycle catch up with my payments,
No Change, I went ahead and moved the Payment date up another week.
No Change. I 've decide that my bill pay is smart enough to finish out the subscription and I'll not renew. I'm sure that I can find a more ethical Company to deal with.

The Real issue is That I am able to catch this and deal with it. I was helping my father with his monthly bills, it crossed my mind, That my father who is 89 and in good mental health still wants to pay the "Entire amount due" and would go ahead and pay that full amount. Repeated, Every month...
And I'll bet the majority of Subscribers are older. Grandparents, that remember Highlights from their childhood...

Now I can't prove anything and have not done enough research, but Just the fact that no activity shows on my bill, no matter when I pay my bill, Tells me that someone is hiding something, It's the only logical explanation for not meeting standard business and accounting practices.

I'm only paying for the magazines that they have sent me. I dont agree that i have to pay in full for the whole year that i agree to. So go back to them and see how many they sent me and bill me. If i pay the whole amount then i better get the rest of my order. I think that is the fair way. I only received about 2 or 3 magazines of Highlights For Children.